I use the imx6ql-sabreauto board to communicate with a slave board.
I want to know the highest speed of spi block.
I read the document and i think the highest speed is up to 60MHz.
and i use the ioctl like this
ioctl (fd, SPI_IOC_WR_MAX_SPEED_HZ, 60MHz)
But , I don't confirm whether this is effective or not.
How do I know the actual speed of the SPI work with?